:root {
  color-scheme: light;
  --bg: #f3f3f0;
  --text: #191918;
  --mid: #4f4e49;
  --light: #6f6b64;
  --accent: #8a5a00;
  --accent-fill: #e8bc4b;
  --line: #191918;
  --soft-line: #d2d2cb;
  --rail: 116px;
  --gutter: 32px;
  --page-inline: clamp(16px, 5vw, 32px);
  --nav-anchor-offset: 72px;
}

::selection {
  background: var(--accent-fill);
  color: var(--text);
}

.page {
  width: min(100%, 1040px);
  padding: 24px var(--page-inline) 96px;
}

html {
  scroll-padding-top: var(--nav-anchor-offset);
}

.site-nav {
  position: sticky;
  top: 0;
  z-index: 10;
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto minmax(0, 1fr);
  align-items: center;
  min-height: 48px;
  background: var(--bg);
  border-bottom: 1px solid var(--soft-line);
}

.site-nav-home,
.site-nav-links a {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  color: var(--mid);
  font-family: var(--mono);
  font-size: 12px;
  line-height: 1.5;
  letter-spacing: 0.045em;
  text-decoration: none;
  text-transform: none;
  white-space: nowrap;
  box-shadow: none;
  transition: color 180ms ease, box-shadow 180ms ease;
}

.site-nav-home {
  justify-self: start;
  gap: 0.18em;
  padding-right: 12px;
  color: var(--text);
  font-family: "Source Serif 4", Georgia, serif;
  font-size: 17px;
  font-weight: 400;
  line-height: 1;
  letter-spacing: 0.02em;
  font-variation-settings: "opsz" 48;
}

.site-nav-initial {
  font-family: var(--display-serif);
  font-size: 1.14em;
  font-style: italic;
  letter-spacing: -0.08em;
  transform: translateY(-0.02em);
}

.site-nav-dot {
  margin: 0 0.08em 0 0.035em;
  color: var(--accent);
  font-family: var(--mono);
  font-size: 0.58em;
  font-style: normal;
  letter-spacing: 0;
  vertical-align: 0.34em;
}

.site-nav-surname {
  margin-left: 0.08em;
  font-family: var(--mono);
  font-size: 0.68em;
  font-weight: 500;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  transform: translateY(0.04em);
}

/* Local mark study: each option keeps the same footprint and underline while
   changing only the typographic voice. The default remains the production-safe
   mark above; these variants are selected with ?mark=... in the local demo. */
html[data-mark="cormorant"] .site-nav-home {
  gap: 0.1em;
  font-family: "Cormorant Garamond", Georgia, serif;
  font-size: 21px;
  letter-spacing: -0.04em;
}

html[data-mark="cormorant"] .site-nav-initial {
  font-family: "Cormorant Garamond", Georgia, serif;
  font-size: 1.23em;
  font-weight: 500;
  letter-spacing: -0.12em;
}

html[data-mark="cormorant"] .site-nav-dot {
  font-family: "Cormorant Garamond", Georgia, serif;
  font-size: 0.52em;
  vertical-align: 0.46em;
}

html[data-mark="cormorant"] .site-nav-surname {
  font-family: "Cormorant Garamond", Georgia, serif;
  font-size: 0.78em;
  font-variant-caps: small-caps;
  font-weight: 500;
  letter-spacing: 0.08em;
  text-transform: lowercase;
  transform: translateY(0.02em);
}

html[data-mark="ballet"] .site-nav-home,
html[data-mark="tangerine"] .site-nav-home,
html[data-mark="alex"] .site-nav-home,
html[data-mark="pinyon"] .site-nav-home,
html[data-mark="petit"] .site-nav-home {
  gap: 0.08em;
  font-size: 22px;
  letter-spacing: -0.04em;
  text-transform: none;
}

html[data-mark="ballet"] .site-nav-home {
  font-family: "Newsreader", "Source Serif 4", Georgia, serif;
  font-size: 18px;
  letter-spacing: -0.03em;
}

html[data-mark="ballet"] .site-nav-initial {
  font-family: "Ballet", cursive;
  font-size: 1.48em;
  font-style: normal;
  letter-spacing: -0.16em;
}

html[data-mark="ballet"] .site-nav-dot {
  font-family: "Ballet", cursive;
  font-size: 0.44em;
  vertical-align: 0.54em;
}

html[data-mark="ballet"] .site-nav-surname {
  font-family: "Cormorant Garamond", Georgia, serif;
  font-size: 0.8em;
  font-variant-caps: small-caps;
  font-weight: 500;
  letter-spacing: 0.08em;
  text-transform: lowercase;
  transform: translateY(0.02em);
}

/* New type direction: literary mark, chancery strokes, and restrained brush
   accents. Each keeps the compact mark footprint and continuous rule. */
html[data-mark="tangerine"] .site-nav-home,
html[data-mark="tangerine"] .site-nav-initial,
html[data-mark="tangerine"] .site-nav-surname {
  font-family: "Tangerine", cursive;
}

html[data-mark="tangerine"] .site-nav-home {
  font-size: 27px;
  letter-spacing: -0.035em;
}

html[data-mark="tangerine"] .site-nav-initial {
  font-size: 1.12em;
  font-style: normal;
  letter-spacing: -0.12em;
}

html[data-mark="tangerine"] .site-nav-dot {
  font-family: "Tangerine", cursive;
  font-size: 0.48em;
  vertical-align: 0.48em;
}

html[data-mark="tangerine"] .site-nav-surname {
  font-size: 0.95em;
  letter-spacing: 0.01em;
  transform: translateY(0.015em);
}

/* Script accents keep SUN in a restrained Cormorant small-cap treatment. */
html[data-mark="alex"] .site-nav-home,
html[data-mark="pinyon"] .site-nav-home,
html[data-mark="petit"] .site-nav-home {
  font-family: "Newsreader", "Source Serif 4", Georgia, serif;
  font-size: 18px;
  letter-spacing: -0.025em;
}

html[data-mark="alex"] .site-nav-initial {
  font-family: "Alex Brush", cursive;
  font-size: 1.42em;
  font-style: normal;
  letter-spacing: -0.14em;
  transform: translateY(-0.03em);
}

html[data-mark="alex"] .site-nav-dot {
  font-family: "Alex Brush", cursive;
  font-size: 0.5em;
  vertical-align: 0.48em;
}

html[data-mark="alex"] .site-nav-surname,
html[data-mark="pinyon"] .site-nav-surname,
html[data-mark="petit"] .site-nav-surname {
  font-family: "Cormorant Garamond", Georgia, serif;
  font-size: 0.78em;
  font-variant-caps: small-caps;
  font-weight: 500;
  letter-spacing: 0.08em;
  text-transform: lowercase;
  transform: translateY(0.02em);
}

html[data-mark="pinyon"] .site-nav-initial {
  font-family: "Pinyon Script", cursive;
  font-size: 1.32em;
  font-style: normal;
  letter-spacing: -0.12em;
  transform: translateY(-0.02em);
}

html[data-mark="pinyon"] .site-nav-dot {
  font-family: "Pinyon Script", cursive;
  font-size: 0.46em;
  vertical-align: 0.48em;
}

html[data-mark="petit"] .site-nav-initial {
  font-family: "Petit Formal Script", cursive;
  font-size: 1.22em;
  font-style: normal;
  letter-spacing: -0.1em;
  transform: translateY(-0.02em);
}

html[data-mark="petit"] .site-nav-dot {
  font-family: "Petit Formal Script", cursive;
  font-size: 0.48em;
  vertical-align: 0.46em;
}

.site-nav-links {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: clamp(12px, 2vw, 22px);
}

.site-nav-links a {
  padding: 0 1px;
}

.nav-label-compact {
  display: none;
}

.site-nav-home:hover,
.site-nav-home.is-active,
.site-nav-links a:hover,
.site-nav-links a.is-active {
  color: var(--text);
  box-shadow: inset 0 -1px 0 var(--accent);
}

.identity {
  position: relative;
  display: block;
  min-height: 192px;
  padding: 56px 0 0;
  margin: 0 0 32px;
  border-bottom: 0;
}

.identity h1 {
  position: relative;
  display: flex;
  align-items: baseline;
  gap: clamp(32px, 4.5vw, 52px);
  max-width: 900px;
  font-size: inherit;
  line-height: 1;
  letter-spacing: 0;
  font-optical-sizing: auto;
}

.identity h1 .name-en {
  margin: 0;
  font-family: var(--display-serif);
  font-size: clamp(58px, 5.2vw, 76px);
  line-height: 0.92;
  letter-spacing: -0.03em;
  white-space: nowrap;
}

.identity h1 .name-zh {
  margin: 0;
  font-family: "Noto Serif SC", "Songti SC", "STSong", "SimSun", serif;
  font-size: clamp(42px, 3.8vw, 56px);
  line-height: 1;
  font-weight: 400;
  letter-spacing: 0.025em;
  white-space: nowrap;
}

@keyframes editorial-enter {
  from {
    transform: translateY(9px);
    filter: blur(1.5px);
  }

  to {
    transform: translateY(0);
    filter: blur(0);
  }
}

@keyframes portrait-enter {
  from {
    transform: translateY(8px) scale(0.99);
    clip-path: inset(0 0 8% 0);
  }

  to {
    transform: translateY(0) scale(1);
    clip-path: inset(0);
  }
}

.identity h1 .name-en,
.identity h1 .name-zh,
.bio-copy,
.bio img {
  animation-duration: 400ms;
  animation-fill-mode: both;
  animation-timing-function: cubic-bezier(0.16, 1, 0.3, 1);
}

.identity h1 .name-en {
  animation-name: editorial-enter;
}

.identity h1 .name-zh {
  animation-name: editorial-enter;
  animation-delay: 60ms;
}

.bio-copy {
  animation-name: editorial-enter;
  animation-delay: 100ms;
}

.bio img {
  animation-name: portrait-enter;
  animation-delay: 160ms;
}

.theme-toggle {
  position: static;
  justify-self: end;
  display: inline-flex;
  align-items: center;
  justify-content: flex-end;
  min-width: 44px;
  min-height: 44px;
  padding: 0 2px;
  transition: color 180ms ease, border-color 180ms ease, transform 120ms ease;
}

.site-nav .theme-toggle {
  padding-left: 12px;
}

.bio {
  grid-template-columns: minmax(0, 630px) 208px;
  gap: clamp(48px, 6vw, 80px);
  justify-content: space-between;
  align-items: start;
  padding-bottom: 72px;
  margin-bottom: 64px;
  border-bottom-color: var(--line);
}

.bio img {
  grid-column: 2;
  grid-row: 1;
  width: 208px;
  height: 260px;
  aspect-ratio: 4 / 5;
  object-fit: cover;
  object-position: center 42%;
  border: 0;
  border-radius: 0;
  filter: none;
}

.bio-copy {
  grid-column: 1;
  grid-row: 1;
  max-width: 630px;
}

.bio-copy p {
  font-size: 18px;
  line-height: 1.58;
  text-align: justify;
  text-justify: inter-word;
  text-wrap: wrap;
}

.contact-links {
  display: flex;
  flex-wrap: wrap;
  gap: 2px 18px;
  margin-top: 4px;
  font-family: var(--mono);
  font-size: 12px;
  line-height: 1.5;
  letter-spacing: 0.045em;
  text-transform: none;
}

.contact-links a {
  position: relative;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: auto;
  height: auto;
  min-width: 44px;
  min-height: 44px;
  padding: 0;
  gap: 6px;
  color: var(--mid);
  text-decoration: none;
  box-shadow: none;
  transition: color 180ms ease, text-decoration-color 180ms ease, transform 120ms ease;
}

.contact-links a::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  top: calc(50% + 7px);
  height: 1px;
  background: color-mix(in srgb, var(--light) 52%, transparent);
  pointer-events: none;
  transition: background-color 180ms ease;
}

.contact-links a i {
  flex: 0 0 auto;
  font-size: 0.95em;
  line-height: 1;
  text-decoration: none;
}

.contact-links a span {
  display: inline;
}

.contact-links a .ai {
  font-size: 1.05em;
}

.contact-links a:hover {
  color: var(--text);
  box-shadow: none;
}

.contact-links a:hover::after {
  background: var(--accent);
}

a:focus-visible,
button:focus-visible,
.news-scroll:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
}

.contact-links a:active,
.theme-toggle:active {
  transform: translateY(1px);
}

.page > section:not(.bio) {
  padding: 0 0 56px;
  margin: 0 0 64px;
  border-bottom-color: var(--soft-line);
}

.page > section:last-of-type {
  padding-bottom: 0;
  margin-bottom: 0;
  border-bottom: 0;
}

.page > section.compact-section:not(:last-of-type) {
  padding-bottom: 44px;
  margin-bottom: 56px;
}

.label {
  display: block;
  margin: 0 0 20px;
  color: var(--text);
  font-family: var(--mono);
  font-size: 14px;
  line-height: 1.4;
  font-weight: 500;
  letter-spacing: 0.03em;
  text-transform: none;
}

.items li {
  grid-template-columns: var(--rail) minmax(0, 1fr);
  gap: var(--gutter);
}

.papers li {
  grid-template-columns: clamp(68px, calc(15vw + 20px), 116px) minmax(0, 1fr);
  gap: clamp(14px, calc(5.625vw - 4px), 32px);
}

.news-scroll {
  max-height: 320px;
  overflow-y: auto;
  overscroll-behavior-y: auto;
  padding-right: 16px;
  scrollbar-color: color-mix(in srgb, var(--text) 52%, transparent) transparent;
  scrollbar-gutter: stable;
  scrollbar-width: thin;
}

.news-scroll li {
  grid-template-columns: 10px calc(var(--rail) - 10px) minmax(0, 1fr);
  column-gap: calc(var(--gutter) / 2);
  padding: 0 0 15px;
  margin: 0 0 15px;
  align-items: start;
}

.news-scroll li::before {
  display: block;
  align-self: start;
  justify-self: center;
  margin-top: 0.58em;
}

.news-scroll li:first-child::before {
  margin-top: 0.48em;
}

.news-scroll time,
.news-scroll p {
  line-height: 1.45;
}

.news-scroll time {
  font-size: 12px;
  padding-top: 2px;
}

.news-scroll p {
  font-size: 16px;
}

.news-scroll::-webkit-scrollbar {
  width: 5px;
}

.news-scroll::-webkit-scrollbar-track {
  background: transparent;
}

.news-scroll::-webkit-scrollbar-thumb {
  background: color-mix(in srgb, var(--text) 52%, transparent);
}

.papers h3 {
  min-width: 0;
  overflow: visible;
  margin: 0 0 6px;
  font-family: var(--display-serif);
  font-size: clamp(1.3125rem, 1.229rem + 0.417vw, 1.5rem);
  line-height: 1.24;
  font-weight: 400;
  letter-spacing: -0.018em;
  text-wrap: wrap;
}

.papers h3 a {
  display: inline;
  overflow: visible;
  color: var(--text);
  overflow-wrap: break-word;
  word-break: normal;
  white-space: normal;
  box-shadow: none;
  text-decoration-line: underline;
  text-decoration-color: var(--light);
  text-decoration-thickness: 1px;
  text-decoration-skip-ink: auto;
  text-underline-offset: 0.14em;
}

.papers h3 a:hover {
  box-shadow: none;
  text-decoration-color: var(--accent);
}

.stacked-list h3 {
  font-size: 23px;
  line-height: 1.2;
  letter-spacing: -0.015em;
}

.page > section:not(.bio) > .compact-list,
.page > section:not(.bio) > p {
  width: min(700px, calc(100% - var(--rail) - var(--gutter)));
  margin-left: calc(var(--rail) + var(--gutter));
}

:root[data-theme="dark"] {
  color-scheme: dark;
  --bg: #161614;
  --text: #f0efe9;
  --mid: #c4c2b9;
  --light: #aaa69a;
  --accent: #e7b943;
  --accent-fill: #e7b943;
  --line: #f0efe9;
  --soft-line: #393832;
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  .identity h1 .name-en,
  .identity h1 .name-zh,
  .bio-copy,
  .bio img {
    animation: none;
  }

  .contact-links a,
  .site-nav-home,
  .site-nav-links a,
  .theme-toggle {
    transition: none;
  }
}

@media (max-width: 980px) {
  .identity {
    min-height: 0;
    margin-bottom: clamp(28px, 4vw, 36px);
    text-align: center;
  }

  .identity h1 {
    justify-content: center;
  }

  .bio {
    display: grid;
    grid-template-columns: minmax(0, 38rem);
    justify-content: center;
    gap: 0;
  }

  .bio img {
    --portrait-size: clamp(148px, 17vw, 168px);
    grid-column: 1;
    grid-row: 1;
    width: var(--portrait-size);
    height: var(--portrait-size);
    aspect-ratio: 1;
    margin: 0 auto 32px;
    border-radius: 50%;
  }

  .bio-copy {
    grid-column: 1;
    grid-row: 2;
    width: 100%;
    max-width: 38rem;
    margin: 0;
  }
}

@media (max-width: 640px) {
  :root {
    --rail: 76px;
    --gutter: 16px;
  }

  .page {
    width: 100%;
    max-width: none;
    margin: 0;
    padding: 16px var(--page-inline) 88px;
  }

  :root {
    --nav-anchor-offset: 60px;
  }

  .site-nav {
    display: grid;
    grid-template-columns: minmax(0, 1fr) auto;
    column-gap: 12px;
    justify-content: normal;
    min-height: 44px;
  }

  .site-nav-home,
  .site-nav-links a,
  .site-nav .theme-toggle {
    min-height: 44px;
    font-size: 11px;
  }

  .site-nav-home {
    display: none;
  }

  .site-nav-links {
    min-width: 0;
    justify-content: flex-start;
    gap: clamp(10px, 3vw, 14px);
    overflow-x: auto;
    overscroll-behavior-x: contain;
    scrollbar-width: none;
    white-space: nowrap;
  }

  .site-nav-links::-webkit-scrollbar {
    display: none;
  }

  .site-nav-links a {
    flex: 0 0 auto;
    padding: 0 4px;
  }

  .site-nav-links .nav-label-full {
    display: none;
  }

  .site-nav-links .nav-label-compact {
    display: inline;
  }

  .site-nav .theme-toggle {
    flex: 0 0 auto;
    min-width: 44px;
    padding: 0;
  }

  .identity {
    padding-top: 44px;
    min-height: 0;
    margin-bottom: clamp(22px, 6vw, 28px);
  }

  .identity h1 {
    display: block;
    text-align: center;
  }

  .identity h1 .name-en {
    display: block;
    font-size: clamp(48px, 14.3vw, 56px);
  }

  .identity h1 .name-zh {
    display: block;
    margin: 14px 0 0;
    font-size: clamp(36px, 10.4vw, 42px);
    letter-spacing: 0.035em;
  }

  .bio {
    display: block;
    padding-bottom: 64px;
    margin-bottom: 56px;
  }

  .bio img {
    --portrait-size: clamp(128px, 36vw, 144px);
    width: var(--portrait-size);
    height: var(--portrait-size);
    margin: 0 auto 26px;
  }

  .bio-copy p {
    font-size: 17px;
    line-height: 1.58;
    text-align: left;
  }

  .contact-links {
    justify-content: flex-start;
    gap: 2px 10px;
    font-size: 12px;
  }

  .page > section:not(.bio) {
    padding-bottom: 48px;
    margin-bottom: 56px;
  }

  .label {
    margin-bottom: 20px;
  }

  .items li {
    grid-template-columns: var(--rail) minmax(0, 1fr);
    gap: var(--gutter);
  }

  .news-scroll li {
    grid-template-columns: 10px calc(var(--rail) - 10px) minmax(0, 1fr);
    column-gap: calc(var(--gutter) / 2);
  }

  .news-scroll {
    max-height: 288px;
    padding-right: 10px;
  }

  .stacked-list h3 {
    font-size: 21px;
  }

  .page > section:not(.bio) > .compact-list,
  .page > section:not(.bio) > p {
    width: auto;
    margin-left: 0;
  }
}

/* The full three-track navigation fits again before the compact rail would
   acquire a visually empty centre. Keep the desktop alignment through this
   intermediate range, then switch to the touch-scrollable rail below it. */
@media (min-width: 540px) and (max-width: 640px) {
  .site-nav {
    grid-template-columns: minmax(0, 1fr) auto minmax(0, 1fr);
    column-gap: 0;
    min-height: 48px;
  }

  .site-nav-home {
    display: inline-flex;
    font-size: 18px;
  }

  .site-nav-links {
    min-width: auto;
    justify-content: center;
    gap: clamp(12px, 2vw, 16px);
    overflow: visible;
    white-space: normal;
  }

  .site-nav-links a {
    padding: 0 1px;
    font-size: 12px;
  }

  .site-nav-links .nav-label-full {
    display: inline;
  }

  .site-nav-links .nav-label-compact {
    display: none;
  }

  .site-nav .theme-toggle {
    min-width: 44px;
    padding-left: 12px;
    font-size: 12px;
  }
}

@media (max-width: 360px) {
  :root {
    --rail: 68px;
    --gutter: 14px;
  }

  .page {
    padding: 16px var(--page-inline) 72px;
  }

  .site-nav-home {
    display: none;
  }

  .identity h1 .name-en {
    font-size: 46px;
  }

  .identity h1 .name-zh {
    font-size: 36px;
  }
}